CN110350750B - Stator permanent magnet type rotary transformer with even poles - Google Patents
Stator permanent magnet type rotary transformer with even poles Download PDFInfo
- Publication number
- CN110350750B CN110350750B CN201910454043.XA CN201910454043A CN110350750B CN 110350750 B CN110350750 B CN 110350750B CN 201910454043 A CN201910454043 A CN 201910454043A CN 110350750 B CN110350750 B CN 110350750B
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- stator
- permanent magnet
- feedback winding
- core
- winding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/18—Rotary transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K24/00—Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention provides a stator permanent magnet type rotary transformer with even poles, which comprises: a stator and a rotor; the stator comprises a stator core and a plurality of permanent magnets, the stator core is of an annular structure, a plurality of stator teeth are circumferentially arranged on the inner periphery of the stator core, and each stator tooth extends along the radius direction of the core; the permanent magnets are uniformly distributed on a concentric circle of the stator core along the circumference, and each permanent magnet is respectively arranged on a yoke part of the stator core; and the polarities of the adjacent permanent magnets are opposite along the circumferential direction of the plurality of permanent magnets. In the invention, when the rotor rotates at a high speed, no electric signal is needed to be input to the excitation winding, and the position of the stator is measured by the no-load counter potential signal induced by the sine feedback winding and the cosine feedback winding in the magnetic field of the permanent magnet.
Description
Technical Field
The invention relates to the technical field, in particular to a stator permanent magnet type rotary transformer with even poles.
Background
At present, a photoelectric encoder or a rotary transformer is often adopted as a position feedback signal driven by a conventional motor.
The photoelectric encoder has high cost, quick aging and easy damage, and is not suitable for the application occasions with severe working environment and the high-speed or ultra-high-speed occasions.
In the prior art, the application of a reluctance type resolver is very common, and a high-frequency voltage signal is injected into a winding to obtain a feedback electric signal containing position information through air gap reluctance modulation, so that the position of a rotor is measured. However, this solution requires very high frequency signal injection at high speed, and requires a very high performance signal decoding processor, which is too costly to be suitable for engineering applications.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a stator permanent magnet type rotary transformer with even poles.
The invention provides a stator permanent magnet type rotary transformer with even poles, which comprises: a stator and a rotor;
the stator comprises a stator iron core and a plurality of permanent magnets, and the stator iron core comprises stator teeth distributed along the circumference; the permanent magnets are uniformly distributed on the yoke part of the stator core along the circumference; and the polarities of the adjacent permanent magnets are arranged in opposite directions along the circumferential direction of the plurality of permanent magnets;
each stator tooth is wound with an excitation coil, and all the excitation coils are connected in series to form an excitation winding; each stator tooth is also wound with a sine feedback coil or a cosine feedback coil, all the sine feedback coils are connected in series to form a sine feedback winding, all the cosine feedback coils are connected in series to form a cosine feedback winding, and a phase difference exists between an output signal of the sine feedback winding and an output signal of the cosine feedback winding;
the rotor comprises a rotor core, a plurality of salient poles which are uniformly distributed along the circumferential direction are arranged on the periphery of the rotor core, and the projections of the salient poles on the circular section direction of the rotor core are all arc lines protruding towards the stator core.
Preferably, the number of salient poles is equal to the number of permanent magnets, and each salient pole is rotationally symmetric about the central axis of the rotor core.
Preferably, the number of the stator teeth between any two adjacent magnetic poles is equal along the circumferential direction of the stator core.
Preferably, the number of stator teeth is four times the number of permanent magnets.
Preferably, the number of stator teeth occupied by the sine feedback winding is equal to the number of stator teeth occupied by the cosine feedback winding.
Preferably, the sine feedback winding and the cosine feedback winding are distributed at intervals in the stator teeth.
Preferably, the permanent magnets are mounted at the top, middle or root of the stator teeth.
Preferably, the permanent magnet is embedded in the stator core.
Preferably, the stator core and the rotor core are formed by laminating silicon steel sheets.
Preferably, when the rotor rotates at a low speed, a high-frequency voltage signal is input into the excitation winding, and then the position of the stator is measured through an envelope curve of high-frequency feedback signals output by the sine feedback winding and the cosine feedback winding;
when the rotor rotates at a high speed, the input of the electric signals to the excitation winding is stopped, and the position of the stator is measured through no-load counter potential signals induced by the sine feedback winding and the cosine feedback winding in the magnetic field of the permanent magnet.
When the rotor rotates at a high speed, the input of the electric signals to the excitation winding is stopped, and the position of the stator is measured through no-load counter potential signals induced by the sine feedback winding and the cosine feedback winding in the magnetic field of the permanent magnet.
The permanent magnet of the stator permanent magnet type rotary transformer with even poles provided by the invention generates a constant magnetic field, magnetic lines of force in the magnetic field penetrate through coils on stator teeth and a rotor core, and the width of an air gap between the rotor and the stator teeth is periodically changed along with the rotation of the rotor, so that magnetic chains in a sine feedback winding and a cosine feedback winding are also periodically changed along with the rotation of the rotor, electric signals respectively obtained by induction of the sine feedback winding and the cosine feedback winding in the magnetic field are changed along with the rotation of the rotor, and particularly, when the rotor runs at a high speed, the sine feedback winding and the cosine feedback winding respectively obtain stronger sine signals and cosine signals by induction.
Therefore, in the invention, when the rotor rotates at a high speed, no electric signal is needed to be input to the excitation winding, and the position of the stator is measured through no-load back electromotive force signals induced by the sine feedback winding and the cosine feedback winding in the magnetic field of the permanent magnet.
Drawings
Fig. 1 is a schematic structural diagram of a stator permanent magnet type resolver with even poles according to the present invention.
FIG. 2 is a schematic view of the operating principle of the permanent magnet type rotary transformer with even-number pole stator of the present invention;
FIG. 3 is a waveform diagram of sine signals generated by the sine feedback winding and cosine signals generated by the cosine feedback winding when the rotor moves at a low speed;
fig. 4 is a waveform diagram of a sine signal generated by the sine feedback winding and a cosine signal generated by the cosine feedback winding when the rotor moves at a high speed.
The figure is as follows: stator 1, stator core 11, stator tooth 12, permanent magnet 13, excitation winding 141, sine feedback winding 142, cosine feedback winding 143, rotor 2, rotor core 21, salient pole 22, air gap 3.
Detailed Description
Referring to fig. 1, the present invention provides an even-pole stator permanent magnet type resolver, including: a stator 1 and a rotor 2.
The stator 1 includes a stator core 11 and a plurality of permanent magnets 13, the stator core 11 is an annular structure, a plurality of stator teeth 12 are circumferentially arranged on an inner circumference of the stator core 11, and each stator tooth 12 extends along a radial direction of the stator core 11. Specifically, in the present embodiment, the stator core 11 and the stator teeth 12 are integrally formed and laminated by silicon steel sheets.
The plurality of permanent magnets 13 are circumferentially and uniformly distributed on a concentric circle of the stator core 11, and each permanent magnet 13 is mounted on a yoke portion of the stator core 11 or a stator tooth 12. And, along the circumferential direction of the plurality of permanent magnets 13, the adjacent permanent magnets 13 are arranged with opposite polarities. Specifically, the permanent magnet 13 may be mounted on the top, middle or root of the stator tooth 12, and the permanent magnet 13 may also be mounted on the stator core 11 in an embedded manner.
Specifically, in the present embodiment, the number of the permanent magnets 13 is even, so as to ensure that two adjacent permanent magnets 13 face each other in the same polarity all the time. Meanwhile, in the embodiment, the independence of the magnetic fields generated by the permanent magnets 13 is also ensured by the arrangement mode that the polarities of the adjacent permanent magnets 13 are opposite, so that the magnetic fields of the permanent magnets 13 are ensured to be matched with each other to cover the stator teeth 12 comprehensively.
Each stator tooth 12 is wound with an excitation coil, and all the excitation coils are connected in series to form an excitation winding 141. Each stator tooth 12 is further wound with a sine feedback coil or a cosine feedback coil, all the sine feedback coils are connected in series to form a sine feedback winding 142, all the cosine feedback coils are connected in series to form a cosine feedback winding 143, and a phase difference exists between an output signal of the sine feedback winding 142 and an output signal of the cosine feedback winding 143.
In the present embodiment, the sine feedback winding 142 and the cosine feedback winding 143 are always in the magnetic field of the permanent magnet 13 by the arrangement of the permanent magnet 13.
The rotor 2 includes a rotor core 21, a plurality of salient poles 22 are uniformly distributed along a circumferential direction on an outer periphery of the rotor core 21, projections of the salient poles 22 in a circular cross-sectional direction of the rotor core 21 are arcs protruding toward the stator core 11, and an axial direction of each salient pole 22 is parallel to an axial direction of the rotor core 21. In the present embodiment, the rotor core 21 is formed by laminating silicon steel sheets.
In this embodiment, the permanent magnet 13 generates a constant magnetic field, the magnetic lines of force in the magnetic field pass through the coils on the stator teeth 12 and the rotor core 21, and as the rotor 2 rotates, the width of the air gap 3 between the rotor 2 and the stator teeth 12 periodically changes, so that the magnetic flux linkage in the sine feedback winding 142 and the cosine feedback winding 143 also periodically changes, so that the electric signals induced in the magnetic field by the sine feedback winding 142 and the cosine feedback winding 143 respectively change along with the rotation of the rotor 2, and especially when the rotor 2 operates at a high speed, the sine feedback winding 142 and the cosine feedback winding 143 respectively induce strong sine signals and cosine signals.
In the present embodiment, due to the dispersed arrangement of the permanent magnets 13, the electromagnetic fields generated by two adjacent permanent magnets 13 have an angle difference; and because the sine feedback winding 142 and the cosine feedback winding 143 are wound around different stator teeth 12, a phase difference exists between the sine signal sensed by the sine feedback winding 142 and the cosine signal sensed by the cosine feedback winding 143.
Therefore, in the present embodiment, when the rotor 2 rotates at a high speed, it is not necessary to input an electric signal to the excitation winding 141, and the position of the stator 1 is measured by the no-load back electromotive force signal induced in the magnetic field of the permanent magnet 13 by the sine feedback winding 142 and the cosine feedback winding 143. Specifically, when the rotor 2 rotates at a high speed, due to reflection on the outer periphery of the rotor 2, the magnetic field distribution in the area where the stator teeth 12 are located changes in real time, so that the potential induced by the sine feedback winding 142 and the potential induced by the cosine feedback winding 143 also change in real time, and the position of the vehicle stator 1 can be determined according to the potential induced by the sine feedback winding 142 and the potential induced by the cosine feedback winding 143. As shown in fig. 4, after the high-frequency voltage signal in the excitation winding 141 is turned off at a high speed, no-load back electromotive force is induced in the sine feedback winding 142 and the cosine feedback winding 143 by the permanent magnet 13.
When the rotor 2 rotates at a low speed, the position of the stator 1 is measured by inputting a high frequency voltage signal into the field winding 141 and then by the envelope of the high frequency feedback signals output from the sine feedback winding 142 and the cosine feedback winding 143. As shown in fig. 3, the high-frequency feedback signals are obtained from the sine feedback winding 142 and the cosine feedback winding 143 by injecting a high-frequency voltage signal into the excitation winding 141 at a low speed.
In the present embodiment, the number of the salient poles 22 is equal to the number of the permanent magnets 13, and each salient pole 22 is rotationally symmetric about the central axis of the rotor core 21. In this way, the salient poles 22 reflect the magnetic field, so that the composite magnetic field formed by the magnetic field generated by the permanent magnet 13 and the reflected magnetic field periodically changes in real time.
In the present embodiment, the number of stator teeth 12 between any two adjacent magnetic poles is equal. Therefore, the distances of a complete electric period T0 formed between any two permanent magnets 13 are equal, and the periodic change of the electric signal output by the sine feedback winding 142 and the electric signal output by the cosine feedback winding 143 is facilitated. In the present embodiment, any two adjacent magnetic poles are the same magnetic poles facing the two adjacent permanent magnets 13.
In the present embodiment, the number of stator teeth 12 is four times the number of permanent magnets 13. Thus, an electrical angle T1 of 90 degrees is formed between two adjacent stator teeth 12, and 4 stator teeth 12 between two adjacent permanent magnets 13 form a complete electrical period T0.
In this embodiment, the number of the stator teeth 12 occupied by the sine feedback winding 142 is equal to the number of the stator teeth 12 occupied by the cosine feedback winding 143, and the stator teeth 12 occupied by the sine feedback winding 142 and the stator teeth 12 occupied by the cosine feedback winding 143 are distributed at intervals. Thus, a 90-degree phase difference can be formed between the electric signal output by the sine feedback winding 142 and the electric signal output by the cosine feedback winding 143, that is, the waveform output by the sine feedback winding 142 is orthogonal to the waveform output by the cosine feedback winding 143.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (9)
1. An even-pole stator permanent magnet resolver, comprising: a stator (1) and a rotor (2);
the stator (1) comprises a stator iron core (11) and a plurality of permanent magnets (13), wherein the stator iron core (11) comprises stator teeth (12) distributed along the circumference; the permanent magnets (13) are uniformly distributed on the yoke part of the stator core (11) along the circumference; and the polarities of the adjacent permanent magnets (13) are opposite along the circumferential direction of the plurality of permanent magnets (13);
each stator tooth (12) is wound with an excitation coil, and all the excitation coils are connected in series to form an excitation winding (141); each stator tooth (12) is also wound with a sine feedback coil or a cosine feedback coil, all the sine feedback coils are connected in series to form a sine feedback winding (142), all the cosine feedback coils are connected in series to form a cosine feedback winding (143), and phase difference exists between output signals of the sine feedback winding (142) and output signals of the cosine feedback winding (143);
the rotor (2) comprises a rotor core (21), a plurality of salient poles (22) which are uniformly distributed along the circumferential direction are arranged on the periphery of the rotor core (21), and the projections of the salient poles (22) in the circular section direction of the rotor core (21) are all arcs which are convex towards the stator core (11);
when the rotor (2) rotates at a low speed, a high-frequency voltage signal is input into the excitation winding (141), and then the position of the stator (1) is measured through the envelope of high-frequency feedback signals output by the sine feedback winding (142) and the cosine feedback winding (143);
when the rotor (2) rotates at a high speed, the input of the electric signal to the excitation winding (141) is stopped, and the position of the stator (1) is measured through no-load counter potential signals induced in the magnetic field of the permanent magnet (13) by the sine feedback winding (142) and the cosine feedback winding (143).
2. The stator permanent magnet type rotary transformer of even number of poles according to claim 1, wherein the number of salient poles (22) is equal to the number of permanent magnets (13), and each salient pole (22) is rotationally symmetric about the central axis of the rotor core (21).
3. The stator permanent magnet type rotary transformer of even-numbered poles according to claim 1, wherein the number of stator teeth (12) between any two adjacent poles is equal along the circumferential direction of the stator core (11).
4. A stator permanent magnet resolver of even poles according to claim 3, characterised in that the number of stator teeth (12) is four times the number of permanent magnets (13).
5. The stator permanent magnet resolver of even-numbered poles according to claim 1, wherein the number of stator teeth (12) occupied by the sine feedback winding (142) is equal to the number of stator teeth (12) occupied by the cosine feedback winding (143).
6. The stator permanent magnet resolver of even-numbered poles according to claim 5, wherein the sine feedback winding (142) occupies the stator teeth (12) and the cosine feedback winding (143) occupies the stator teeth (12) at intervals.
7. The stator permanent magnet rotary transformer of even-numbered poles according to claim 1, wherein the permanent magnets (13) are installed at the top, middle or root of the stator teeth (12).
8. The stator permanent magnet type resolver of even-numbered poles according to claim 1, wherein the permanent magnet (13) is embedded in the stator core (11).
9. The stator permanent magnet type rotary transformer of even-numbered poles according to claim 1, wherein the stator core (11) and the rotor core (21) are formed by laminating silicon steel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910454043.XA CN110350750B (en) | 2019-05-28 | 2019-05-28 | Stator permanent magnet type rotary transformer with even poles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910454043.XA CN110350750B (en) | 2019-05-28 | 2019-05-28 | Stator permanent magnet type rotary transformer with even poles |
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| Publication Number | Publication Date |
|---|---|
| CN110350750A CN110350750A (en) | 2019-10-18 |
| CN110350750B true CN110350750B (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910454043.XA Active CN110350750B (en) | 2019-05-28 | 2019-05-28 | Stator permanent magnet type rotary transformer with even poles |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767429B (en) * | 2019-11-01 | 2020-11-10 | 北京动力机械研究所 | Reluctance type rotary transformer capable of high-speed operation |
| CN110828151B (en) * | 2019-11-14 | 2021-11-09 | 南京理工大学 | Axial magnetic flux permanent magnet rotary transformer |
| CN114864271B (en) * | 2022-05-24 | 2024-04-30 | 上海赢双电机科技股份有限公司 | Coil winding method of rotary transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09215296A (en) * | 1996-01-31 | 1997-08-15 | Sankyo Seiki Mfg Co Ltd | Brushless motor |
| CN103036326A (en) * | 2011-09-30 | 2013-04-10 | 三星电机株式会社 | Switched reluctance motor |
| CN104658748A (en) * | 2014-11-26 | 2015-05-27 | 许峻峰 | Self-exciting magnetic resistance type rotary transformer |
| CN109637796A (en) * | 2019-02-11 | 2019-04-16 | 西安微电机研究所 | A kind of high-precision magnetoresistance transformer and its method for winding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4659953A (en) * | 1984-08-21 | 1987-04-21 | Resolvex Corporation | Magnetic structure for synchro and tachometer |
| DE102009061032A1 (en) * | 2009-05-15 | 2010-11-18 | Tyco Electronics Belgium Ec Bvba | Magnetoelectronic angle sensor, in particular reluctance resolver |
-
2019
- 2019-05-28 CN CN201910454043.XA patent/CN110350750B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09215296A (en) * | 1996-01-31 | 1997-08-15 | Sankyo Seiki Mfg Co Ltd | Brushless motor |
| CN103036326A (en) * | 2011-09-30 | 2013-04-10 | 三星电机株式会社 | Switched reluctance motor |
| CN104658748A (en) * | 2014-11-26 | 2015-05-27 | 许峻峰 | Self-exciting magnetic resistance type rotary transformer |
| CN109637796A (en) * | 2019-02-11 | 2019-04-16 | 西安微电机研究所 | A kind of high-precision magnetoresistance transformer and its method for winding |
Non-Patent Citations (1)
| Title |
|---|
| 磁阻式旋转变压器绕组结构设计与参数优化;周凯等;《哈尔滨理工大学学报》;20130630;第18卷(第3期);全文 * |
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| CN110350750A (en) | 2019-10-18 |
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